Ambient Ozone Monitors
Model 202 Ozone Monitor
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The Model 202 Ozone Monitor is designed to enable accurate and precise (±1.5 ppb) measurements of ozone ranging from a few ppb to 100,000 ppb (0-100 ppm) based on the well established technique of UV absorbance at 254 nm. The Model 202 is light weight (5.5 lb, 2.5 kg) and has a power consumption of only ~7 watts. It can be used in almost any application where much larger ozone monitors have been used in the past and in many environments where measurements using traditional ozone monitors are impossible. Flash card memory and a quiet, long-life internal air pump are now provided standard on the Model 202. The Model 202 has been certified by the EPA as a Federal Equivalent Method (FEM): EQOA-0410-190 The Model 202 has been used for the past decade in ozone monitoring networks of the U.S. National Park Service and National Forest Service. It also is widely used by NOAA, EPA, Environment Canada and the British Antarctic Survey for studies of ground-level ozone.
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Model 205 Dual Beam Ozone Monitor
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The Model 205 Dual Beam Ozone Monitor™ was designed for even higher precision and faster response time than our popular Model 202. Data may be output as frequently as every 2 seconds, making it ideal for vertical profiling using balloons or aircraft measurements where high temporal resolution is required. For a given averaging time, the Model 205 has a higher precision (better than 1 ppb for 10 s averaging) and a more stable baseline than the Model 202. The Model 205 has all of the features of the Model 202 single beam instrument, including a real-time clock; averaging times of 10 s, 1 min, 5 min and 1 h; an internal data logger; and serial and analog data outputs. Flash card memory and a long-life, quiet internal air sampling pump are now standard on the instrument. The Model 205 Ozone Monitor has been designated as a Federal Equivalent Method (FEM) by the EPA.
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Model 106-L Ozone Monitor
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The Model 106 series of ozone monitors comprise single beam ozone monitors similar to the Model 202 in size, weight and power consumption. The 106-L, -M, -MH and -H instruments were originally designed for industrial ozone applications. However, the lower cost 106-L ozone monitor may be used for air pollution studies as well and was installed at more than 100 stations around the world in our Global Ozone Project educational outreach program. The Model 106-L has been designated by the US EPA as a Federal Equivalent Method (FEM). The Model 106-L was designed for manufacturability, resulting in a lower cost and more robust instrument. In the near future, the Model 106 series will include a touchscreen as the user interface. More Info Request Quote |
Model OEM-106-L Ozone Monitor
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For OEM applications where users want to integrate their ozone monitor into a complex system such as an air pollution measurement package, we offer an "Ozone Monitor on a Board™" solution. The entire ozone monitor is mounted on a single printed circuit board. The liquid crystal display and power switch may be removed and mounted outside the package if desired. The OEM board may be purchased with one of four different optical benches to optimize measurements in four different concentration ranges as follows: OEM-106-L 0-100 ppm with 0.0001 ppm (0.1 ppb) resolution OEM-106-M 0-1,000 ppm with 0.01 ppm resolution OEM-106-MH 0-10,000 (1 % vol) with 0.1 ppm resolution OEM-106-H 0-20% by weight with 0.01% resolution More Info Request Quote |
Model 211 Scrubberless Ozone Monitor
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The Model 211 Scrubberless Ozone Monitor uses the proven ultraviolet (UV) absorption method in combination with an innovative gas-phase scrubber technology to measure ozone virtually free from interferences. The Model 211 is ideally suited for measurements of ozone in heavily polluted air where interferences from particulates, mercury, and VOCs may be significant. The new Model 211 combines the stability of our Model 205 Dual Beam Ozone Monitor with our selective scrubber technology to provide highly accurate ozone measurements in the most polluted air. The enhanced optical path length of 30 cm provides a precision of better than 0.5 ppb for 10-second measurements, and the instrument can output new ozone measurements as often as every 2 seconds. SD card data logging is now a standard feature. The Model 211 has been designated by the EPA as a Federal Equivalent Method (FEM), EQOA–0514–215, and is being considered as new Federal Reference Method (FRM) for ozone.
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Model 211-G Ozone Monitor
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The new Model 211-G Ozone Monitor uses the proven ultraviolet (UV) absorption method in combination with our patented heated graphite scrubber technology to measure ozone virtually free of interferences. The instrument is ideally suited for measurements of ozone in heavily polluted air where interferences are likely from particulates, mercury, and/or VOCs. The Model 211 combines the stability of our proven dual beam ozone monitors with our selective scrubber technology to provide accurate ozone measurements in the most polluted air. The enhanced optical path length of 30 cm provides a precision of better than 0.5 ppb for 10-second measurements, and the instrument can output new ozone measurements as often as every 2 seconds. The Model 211-G comes with SD flash card memory as a standard feature. The Model 211-G Ozone Monitor has been designated by the EPA as a Federal Equivalent Method (FEM) as a modification to our Model 211 Scrubberless Ozone Monitor: EQOA-0514-215. The Model 211-G offers the ability to measure ozone in heavily polluted urban air with negligible interferences without the use of the nitrous oxide source required by the Model 211.
Use of either the Model 211 or Model 211-G in place of conventional ozone monitors has the potential to bring many regions into compliance with the new national ambient air quality standard simply by making a more accurate measurement. More Info Request Quote |
Personal Ozone Monitor (POM)
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2B Tech has taken the next step in miniaturization of UV-based ozone monitors by developing the Personal Ozone Monitor or "POM." The POM has dimensions of 4 x 3 x 1.5 inches and weighs only 0.75 lb. (340 g). It has a built in GPS so that ozone measurements may be logged continuously along with geographic location. Like all of our ozone instruments, the measurement is based on UV absorbance. It does NOT use a solid-state or electrochemical sensor, both of which are prone to interferences and baseline drift. By folding the optical path in the shape of a "U," it was possible to achieve the same path length in the POM as in the Models 202, 205, and 106-L and thus have similar precision and accuracy (~1.5 ppb). The POM is ideal for personal ozone exposure studies and health and safety monitoring in workplaces where ozone is produced. The US EPA has designated the POM as a Federal Equivalent Method (FEM).
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Model 306 Ozone Calibration Source
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The Model 306 Ozone Calibration Source is a highly portable ozone transfer standard that may be used to calibrate any ozone monitor or sensor. Ozone is generated at any chosen concentration in the range 0-1000 ppb in ozone-scrubbed ambient air at a volumetric flow rate of 3 L/min. No external air source is required. The instrument may be programmed to output a series of up to 10 ozone concentration steps with a chosen time interval. It also has a scheduler that permits the user to schedule an autocalibration once daily. The Ozone Calibration Source is provided with a NIST-traceable calibration, and the menu allows the user to calibrate the output to their own reference instrument. This Ozone Cal Source, which qualifies as an EPA transfer standard, is particularly useful for calibrating networks of ozone monitors in the field.
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The Model 714 NO2/NO/O3 Calibration Source™ combines our Model 408 Nitric Oxide Calibration Source™ with our Model 306 Ozone Calibration Source™ to provide a highly portable transfer standard for three pollutant gases without the need for a compressed gas cylinder of nitric oxide. Calibrated concentrations of O3 are produced by photolysis of oxygen, and calibrated concentrations of NO are produced by photolysis of nitrous oxide. In addition, calibrated concentrations of NO2 are produced by gas-phase titration of NO with O3. Calibrations sequences can be programmed in internal memory via a user-friendly touch screen interface.
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Confused about which ozone monitor best suits your application?
- Decision Tree: This will help you decide which ozone monitor is best for your application.
- Comparison: See a table that compares the specifications of all of our ozone monitors.
- Applications: The most suitable ozone monitors for different applications are discussed here.
Our Tech Note #001 compares the specifications of our Models 106-L, 202, 205, 211 and POM with other high precision ozone monitors (Thermo, Teledyne-API and Ecotech).
The DewLine™: A Unique Advantage of 2B Tech's Ozone Monitors
2B Technologies is unique in the application of a DewLine™ in its design of ozone monitors, to eliminate the interference of water vapor in the measurement of ozone.
All commercially available ozone monitors based on UV absorbance exhibit a water vapor interference. Most scientists who work with UV ozone instruments are aware that rapid changes in humidity, as may occur during a frontal passage, will cause a large zero shift that may last for several hours. This interference is especially troublesome in balloon and aircraft measurements where the instrument may rapidly pass through alternating dry and humid air parcels. It also is a problem when one calibrates an ozone instrument using extremely dry tank air.
The DewLine™ uses Nafion® tubes to equilibrate humidity during I and Io measurement cycles of the ozone instrument. This completely eliminates the water vapor interference -- even for step changes between 0 and 90% RH. All of 2B Technologies' ozone instruments are provided with DewLines™.
This video demonstrates how the DewLine™ eliminates water vapor interferences when measuring ozone. In a side-by-side comparison, a 2B Tech ozone monitor and a monitor that does not use a DewLine™ are exposed to conditions of rapidly changing humidity but unchanging ozone.
All commercially available ozone monitors based on UV absorbance exhibit a water vapor interference. Most scientists who work with UV ozone instruments are aware that rapid changes in humidity, as may occur during a frontal passage, will cause a large zero shift that may last for several hours. This interference is especially troublesome in balloon and aircraft measurements where the instrument may rapidly pass through alternating dry and humid air parcels. It also is a problem when one calibrates an ozone instrument using extremely dry tank air.
The DewLine™ uses Nafion® tubes to equilibrate humidity during I and Io measurement cycles of the ozone instrument. This completely eliminates the water vapor interference -- even for step changes between 0 and 90% RH. All of 2B Technologies' ozone instruments are provided with DewLines™.
This video demonstrates how the DewLine™ eliminates water vapor interferences when measuring ozone. In a side-by-side comparison, a 2B Tech ozone monitor and a monitor that does not use a DewLine™ are exposed to conditions of rapidly changing humidity but unchanging ozone.
For more information about the DewLine™, click here.